### A Lagrange multiplier theorem and a sandwich theorem for convex relations.

J.M. Borwein (1981)

Mathematica Scandinavica

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J.M. Borwein (1981)

Mathematica Scandinavica

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A. Szaz (1981)

Matematički Vesnik

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Janusz Januszewski, Stanislaw Szufla (1992)

Publications de l'Institut Mathématique

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A. F. Kleiner (1973)

Colloquium Mathematicae

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O. Hadžić (1977)

Matematički Vesnik

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O. Hadžić (1978)

Matematički Vesnik

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O. Hadžić (1982)

Matematički Vesnik

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Paweł Domański, Michael Langenbruch (2012)

Studia Mathematica

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We consider the topological algebra of (Taylor) multipliers on spaces of real analytic functions of one variable, i.e., maps for which monomials are eigenvectors. We describe multiplicative functionals and algebra homomorphisms on that algebra as well as idempotents in it. We show that it is never a Q-algebra and never locally m-convex. In particular, we show that Taylor multiplier sequences cease to be so after most permutations.

O. Hadžić, B. Stanković (1970)

Publications de l'Institut Mathématique

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W. J. Stiles (1971)

Colloquium Mathematicae

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Ivan G. Todorov, Lyudmila Turowska (2010)

Banach Center Publications

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The present article is a survey of known results on Schur and operator multipliers. It starts with the classical description of Schur multipliers due to Grothendieck, followed by a discussion of measurable Schur multipliers and a generalisation of Grothendieck's Theorem due to Peller. Thereafter, a non-commutative version of Schur multipliers, called operator multipliers and introduced by Kissin and Schulman, is discussed, and a characterisation extending the description in the commutative...